
/**
 * Copyright 2009 cestum.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
package org.waveprotocol.wave.model.document.operation.algorithm.transformer {
import org.waveprotocol.wave.model.document.operation.Attributes;
import org.waveprotocol.wave.model.document.operation.AttributesUpdate;

final class DeleteElementStartCache extends RangeCache {

  private var type:String;
  private var attributes:Attributes;
  private var parent:Target;
  function DeleteElementStartCache(t:Target, type:String, attributes:Attributes) {
    this.type = type;
    this.attributes = attributes;
    this.parent = t;
  }


  override function resolveRetain(itemCount:int):void {
    parent.doDeleteElementStart(type, attributes);
    ++parent.depth;
  }


  override function resolveDeleteElementStart(type:String, attributes:Attributes):void {
	  parent.dualDeletion();
    ++parent.depth;
    ++parent.otherTarget.depth;
  }


  override function resolveReplaceAttributes(oldAttributes:Attributes, newAttributes:Attributes):void {
	  parent.doDeleteElementStart(type, newAttributes);
    ++parent.depth;
  }


  override function resolveUpdateAttributes(update:AttributesUpdate):void {
	  parent.doDeleteElementStart(type, attributes.updateWith(update));
    ++parent.depth;
  }

}
}